The Problem seems to be introduced on commons [[ https://commons.wikimedia.org/w/index.php?title=File:Comparison_optical_telescope_primary_mirrors_PL.svg&diff=512591666&oldid=512591339 | between 23. August 2020 and 14. November 2020 ]]. Was there currently an librsvg-update on thumbor?
**Problem:**
Clones of clones are not rendered
**Steps to Reproduce: **
```
<?xml version="1.0" encoding="UTF-8"?>
<svg width="120" height="40" version="1.1" viewBox="0 0 120 40" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<circle id="c" cx="40" cy="20" r="10" style="fill:#f00;stroke-width:0"/>
<use id="b" transform="translate(20)" xlink:href="#c"/>
<use id="a" transform="translate(20)" xlink:href="#b"/>
</svg>
```
**Actual Results:**
https://commons.wikimedia.org/wiki/File:Librsvg_bug_nested_use.svg
{F34453209}
**Expected Results:**
https://upload.wikimedia.org/wikipedia/commons/d/db/Librsvg_bug_nested_use.svg
{F34453211}
**Solution:**
It works with librsvg 2.48.9, see [[ https://commons.wikimedia.org/wiki/User_talk:JoKalliauer#SVG_clone_of_a_clone | comons-talk ]]
Update librsvg: T193352
**Discussions:**
Jan21: (Problem description) https://commons.wikimedia.org/wiki/User_talk:JoKalliauer#SVG_clone_of_a_clone
Feb21: (discussion) https://commons.wikimedia.org/wiki/Commons:Graphics_village_pump/March_2021#SVG_file_display_different_from_PNG_previews_and_thumbnails
**Files**
Nov20: https://commons.wikimedia.org/wiki/File:Comparison_optical_telescope_primary_mirrors_PL.svg#filehistory (Version of 18:13, 14. Nov. 2020)
Jan21: https://commons.wikimedia.org/w/index.php?title=File:Test.svg&offset=20210119154600&limit=1#filehistory (version of 15:43, 19. Jan. 2021 by JoKalliauer)
Feb21: https://commons.wikimedia.org/wiki/File:Librsvg_bug_nested_use.svg
----
Reported upstream: https://gitlab.gnome.org/GNOME/librsvg/-/issues/725